In this paper we study self-similar solutions for nonlinear
Schrodinger equations using a scaling technique and the partly
contractive mapping method. We establish the small global
well-posedness of the Cauchy problem for nonlinear Schrodinger
equations in some non-reflexive Banach spaces which contain
many homogeneous functions. This we do by establishing some a
priori nonlinear estimates in Besov spaces, employing the mean
difference characterization and multiplication in Besov spaces.
These new global solutions to nonlinear Schrodinger equations
with small data admit a class of self-similar solutions. Our
results improve and extend the well-known results of Planchon
[18], Cazenave and Weissler [4, 5] and Ribaud and Youssfi [20].